View Full Version : Violent Martian Waters Carved Secret Trench

2013-Mar-07, 09:40 PM
Massive floodwaters on Mars gouged a channel more than 600 miles (1,000 kilometers) long, making a trench that was hidden to scientists until now because volcanic flows buried it underground. Erupting groundwater, perhaps triggered by a volcano or an earthquake, forced water across the surface during the past 500 million years. This carved a trench [...]

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